Doc, I have never known a color blind aircraft electrician!!! That sure looks like all the old peeling blue painted GM motors to me and I have passed every color blind test known to man kind.

Trees

I worked with a color blind engineer once, going through a schematic on a prototype wiring harness with him was a nightmare LOL. We have a color blind painter at work, he can lay it on like Michaelangelo but somebody else has to mix it for him.